Improvement in machines for twisting bars of metal



6.] sh `sI [6 ARTHUR DAVID WILLIAMS. 3 am we Improvement in M. IIIedfor. Twsting Bars of Metal. N0. 119,486, Patented Oct. 3, 1871.

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Patented Oct. 3,1871.

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ARTHUR DAvlD WILLIAMS.

Improvement in Machines for Twisting Bars of Metall,l No. 6 Parentemoct.3,1871.

Uivrrnfl STATES PA'rniv'r @ri-area ARTHUR DAVID WILLIAMS, OF SOOTTSCHAMBERS, PUDDING LANE, LONDON, ENGLAND.

IMPROVEMENT IN MACHINES FOR TWISTENG B-ARS OF METAL.

Specification forming part of Letters Patent No. 119,486, dated October3, 1871.

llov all whom it may concern:

Be it known that I, ARTHUR DAVID Wn.-

LIAMS, of Scotts Chambers, Pudding Lane, in'

the city of London, England, have invented Improvements in Machinery forTwisting Metal Bars and Making Augers and Drills, and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawing making part ofthis specification, in which- Figiue l, Plate l, is an elevation of oneside of the machine. Fig. 2, Plate 1, is a diametrical section throughthe hollow shaft and roller-chuck by which the bars are twisted. Fig. 3,Plate 2, is a front elevation of the machine. Fig. 4, Plate 2, is a faceview of the roller-chuck. Fig. 5, Plate 2, is a sectional view of pipesfor introducing the spray through which the bars pass. Fig. 6, Plate 3,is a section taken horizontally through the roller-chuck.

Similar letters of reference indicate correspondv ing parts in theseveral figures.

This invention relates to certain novel improvements in machinery forforming twisted angers and drills. drawing them between rollers whichare applied to a hollow chuck, while the ends by which said bars areheld and drawn through the rollers are not allowed to revolve, and whilethe twisted shape given to the bars is properly preserved by injecting aiiuid upon them in the form of spray, as will be hereinafter explained.

The following description of my invention will enable others skilled inthe art to understand it.

In the annexed drawing, Plates 1 and 2, A represents a strong frame, inwhich are the following working parts of the machine: B represents adriving-drum, which is fixed on a horizontal axle carrying on itsextremities bevel spur-wheels G and D. These wheels engage respectivelywith spur-wheels F and E, wheel F being iixed on a vertical hollowshaft, G, and wheel E being xed on a vertical shaft which carries anendless screw, H. This screw H gears with a helicoidal cog-wheel, I,which is fixed on a shaft, J, which latter carries on each end ,achain-wheel, b. In

v the same planes with wheels b are other chainwheels b b, applied so asto turn on studs J J2. Working on the chain-wheels b are two chains, ca, the ends of which are connected to a traveler, N, by means ofadjustable eyes or links, as

My object is to twist bars spirally byv shown in Fig. l, which traveleris provided with a clamp, U, for holding the en ds of the bars whilethey are being twisted. This traveler N Works on'apair of verticalguide-rods, S S. The waterpipe T presents a contracted outlet toward theaxis of the hollow shaft G, which outlet is arranged inl such relationto the orifice of au injector, T t, that steam or air forced throughthis injector' will convert water issuing from pipe T into spray, whichwill be directed against the bar while it is being twisted. If desirablea number of these spray-forming devices may be arranged around a comlnoncenter coinciding with the vertical axis of the hollow shaft G, so thatthe twisted bar will be supplied with spray from different points. Acentrally-perforated disk, Q, is iixed on the lower end of the hollowshaft G, and to the bottom of this disk a chuck, R, is secured so as torotate with said shaft and disk. The chuck Q is provided with tworectilinear heads, P P, working in grooves, and made adjustable by meansof screws d d. Each one of the headsP has two converging slots, o o,through it, in which are fitted to slide bearing-blocks un for the endsof two rollers, w fw. By means of annular grooves in the reduced ends ofthe rollers fw w and pins which are inserted into the blocks n andreceived into said grooves, the blocks n 'n of each roller w areconnected to it, as shown in Figs. 4 and 6. The ends of theadjusting-screws el d are connected to the sliding heads P P in the samemanner as the'rollers w w are connected to their bearing-blocks.

The .operation of the machine is asfollows: The auger-blank or bar, whenheated to the required temperature, is passed through the hollow shaft Gand between the chuck-rollers w w. The lower end of the said bar is thenclamped in the traveler u, which should have been adjusted up to thechuck before the bar is inserted through the shaft G. Motion being givento the machine by the driving-drum B, it is transmitted to the shaft Gand chuck R by the wheels O and F, and to the traveler N by the wheels DE H I b and belts a, the effect of which is that the bar will be drawnslowly down by the traveler at the same time that it is made to revolveon its own axis by the rollers w w in the chuck R. These combinedmotions give the bar a spiral twist, which is continued uniformlythroughout its entire length. The pitch ofthe twist depends on therelative velocities of the traveler N and chuck G, which can be varied bv chain-wheels, over which the chains a work. By means of the outlets inthe water-pipes jets of water are continuous] y directed on the bar asit emerges twisted from between the rollers fw w, thus maintaining theregularity ofthe twist throughout the entire length of the bar. For somequalities of metal, instead of the arrangement of water-jets lastdescribed I prefer to convert the jets of water or other liquid usedinto spray, the temperature of which can be regulated at will by anyconvenient eontrivance. The injector shown in the dra-wing, Fig. 5, willbe found to answer an excellent purpose for producing` thespray. Thesteam issuing from the orifice of the pipe T causes a blast of airthrough the funnel, which impinges on thc liquid jets or issues from thepipe T' and converts the same into spray.

I do not coniine myself to the construction of the devices hereindescribed for carrying my invention into eii'ect, as other meansequivalent thereto may be adopted which will operate on the sameprinciple.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, 1s-

l. The chucking apparatus, constructed substantially as described.

2. The combination of the revolving and adjustable chucking apparatuswith the traveler N' and moving1 chain M, substantially as described.

3. The combination, with the chucking apparatus and the traveler N', ofthe pipe T', substantially as described.

4. The combination, with the chucking apparatus and the traveler N', ofthe pipes T' t T, substantially as described.

In testimony whereof I have signed my name to this specication in thepresence of two subscribing witnesses.

ARTHUR DAVID WILLIAMS.

AUGUSTINE LoUIs DUNPHY. (66)

